Aww hun, its defo the hormones!! I know from experience that time can literally FLY BY whilst gaming. One minute you sit down to play a 30 minute game, the next, about 5 hours later you're like no way...shit where did the time go!
I'm sure he hasn't intentionally meant to ignore you hun, guys just get carried away when hanging out with their mates.
It does sound like you are having a crappy time at the moment though and
to you.
Its healthy that you both are able to do things separately too, so whilst he's hanging out with a mate, you go enjoy yourself in town with your Dad.
BTW, your OH may be busy getting you a birthday pressie, so may not be able to be on FB chat? I know I couldn't do FB chat on my mobile, but I can update my status etc whilst waiting on bus or grabbing a bite to eat.
Pregnancy hormones are a BITCH!!
Hope u feel better soon x